Konftel 300wx Wireless Conference Phone, Black Record calls on a SD memory card, listen to it later or share it with others. The rechargeable lithium ion battery ensures superior performance with up to 60 hours of talk time, this allows a full working week without worrying about recharging! The Konftel 300Wx can also be easily connected to your cell phone or computer via USB for VoIP calls over the internet. Its embedded line mode enables you to connect DECT, cell phones and USB simultaneously for multi-party calls. The Konftel 300Wx is expandable with microphones, equipped with Konftel's patented Omni Sound audio technology for crystal clear sound